Kernel panic on kernel 3.8.x when closing bluetooth dun connection

Hi,

This is just a short note to let you know that 3.8.x panics on closing a 
bluetooth dun connection.

This is seen with the ubuntu /mainline/ kernel 3.8.0 and 3.8.2 that should 
vanilla kernels with no ubuntu tweaking.

Observed on a DELL E6500 which has BCM2046 Bluetooth while connecting to the
internet using a Samsung Galaxy S mobile phone via bluetooth DUN through the 
network manager.  When network manager is asked to close the connection, the 
kernel panics, the system drops out of Xorg, shows for a couple of seconds a 
long log including the words 'panic' and 'not synching', the numlock, caps-lock 
keys start flashing and the system freezes.

It is 100% repeatable.

kernels 3.7.0 and 3.7.8 do not panic.

Thanks for the attention and best regards,

Sergio Callegari